package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {


    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public Result sendCode(String phone, HttpSession session) {
        // 校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            // 如果不符合，返回错误信息
            return Result.fail("手机号格式错误");
        }
        // 符合，生成验证码
        String code = RandomUtil.randomNumbers(6);
        // 保存验证码到session当中
        // session.setAttribute("code", code);
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone, code, LOGIN_CODE_TTL, TimeUnit.MINUTES);
        // 发送验证码
        log.debug("发送验证码成功：{}",code);
        // 返回
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        // 校验验证码
        if (RegexUtils.isPhoneInvalid(loginForm.getPhone())) {
            return Result.fail("请填写正确的手机号");
        }
        // 取验证码
        String loginFormCode = loginForm.getCode();
        // Object code = session.getAttribute("code");
        String code = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+loginForm.getPhone());
        if (code == null || !code.toString().equals(loginFormCode)){
            return Result.fail("验证码错误");
        }
        // 根据手机号查询用户
        LambdaQueryWrapper<User> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(User::getPhone, loginForm.getPhone());
        User user = getOne(lambdaQueryWrapper);
        if (user == null){
            // 创建用户
            user = createUserWithPhone(loginForm.getPhone());
        }
        // session.setAttribute("user", BeanUtil.copyProperties(user, UserDTO.class));
        // 保存用户到redis中
        // 随机生成token
        String token = UUID.randomUUID().toString();
        // 将user对象转为Hash存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> map = BeanUtil.beanToMap(userDTO, new HashMap<>(), CopyOptions.create()
                .setIgnoreNullValue(true)
                .setFieldValueEditor((fieldName,fieldValue) -> fieldValue.toString()));
        String tokenKey  = LOGIN_USER_KEY+token;
        stringRedisTemplate.opsForHash().putAll(tokenKey, map);
        stringRedisTemplate.expire(tokenKey, LOGIN_USER_TTL, TimeUnit.MINUTES);
        return Result.ok(token);
    }

    @Override
    public Result sign() {
        Long userId = UserHolder.getUser().getId();
        LocalDateTime now = LocalDateTime.now();
        String keySuffix = now.format(DateTimeFormatter.ofPattern("yyyyMM"));
        String key = USER_SIGN_KEY + userId + keySuffix;
        // 今天是第几天
        int dayOfMonth = now.getDayOfMonth();
        // 写入redis
        stringRedisTemplate.opsForValue().setBit(key, dayOfMonth-1, true);
        return Result.ok();
    }

    private User createUserWithPhone(String phone){
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX+RandomUtil.randomNumbers(10));
        save(user);
        return user;
    }
}
